Machine for punching- metal



UNITED STATES PATENT OFFICE.

O. J. DAVIE AND T. \V. STEPHENS, OF ERIE, PENNSYLVANIA.

MACHINE FOR PUNCHING METAL.

Specification of Letters Patent No. 10,098, dated October 4, 1853.

To al whom t may concern Be it known that we, OZIAs J. DAviE and THOMAS WV. STEPHENS, both of Erie, in the county of Erie and State of Pennsylvania, have invented certain new and useful Improvements in Machines for Punching and Shearing' Iron; and we do hereby declare the following to be a full, clear, and exact description of the same, reference being had to the accompanying drawing, making a part thereof, and which represents a perspective view of the entire machine with the front plate removed for the purpose of showing the rollers, eccentric, and yoke in which they are arranged and operate.

The nature of our invention consists in disconnecting' the punch or its stock from the yoke by an automatic movement at each operation of the machine by means of a weight, spring, or their equivalent-s acting in connection with a wedge or its equivalent in which position the punch ceases to operate until the metal to be punched is properly in place, when by a slight touch of the operator upon the rising of the punch the con nection between them is again made, and the punch is thrown into ope-ration, by this means allowing the machine to continue in motion, while t-he punch is only brought into action when the sheet of metal is properly placed for it.

To ena-ble others skilled in the art to make and use our invention we will proceed to describe the same with reference to the drawing.

The base A, and upright part B, of the frame, may be cast in one solid piece, and on the rear of this frame is attached a trussed pillow block C, in such posit-ion as to form a proper bearing for one of the journals of the shaft which carries the fly wheel D, the other journal of the shaft having its box or bearing on the frame. On the same shaft with the iy wheel is placed a spur gear E, meshing with the cog wheel F, on the shaft 0, of the eccentric Gr, which shaft is also provided with suitable bearings in which it may freely turn. In the front part of the machine the side plates H, and t-he front plate I, form a square chamber in which is placed and operated a yoke J, in the top and bottom of which yoke are placed the friction and lpressing rolls K, K, in suitable bearings, said rolls being provided with small journals to avoid friction. The eccentric Gr, is placed between the friction rolls,

the shafts or journals of all three standing perpendicularly one over the other; and as the eccentric G turns upon its bearings which are in the frame, it alternately raises and depresses the yoke by means of the rolls K, K, having their bearings in the yoke, and is always in contact with the surfaces of both rolls, so that the reciprocating movement of the yoke is without jar being bot-h raised and lowered by the eccentric, and consequently with the same power. On top of the yoke may be placed one of the blades a of a pair of shears, made adjustable by the setscrews -the other blade c of the pairbeing of the top of the frame. A gage for the shears may be applied in any well known manner, and as they are common to other machines for a similar purpose may not be herein described or represented. The pieces cut by the shears are thrown off by the guard plate CZ. To the lower part of the yoke J, is attached by a slip jointe, the punch stock L, which carries the punches, and on said stock, is arranged a curved arm f, in which is hinged a curved lever h, having on its lower end a ball or weight i, and on its upper end, a flat wedge-shaped key j, which when forced into the slip joint e, between the yoke and the punch stock completes the connection and throws the punchinto operation. Then the yoke is being raised up, the key becomes loosened the weight or pressure of the yoke and rolls being removed from it), and by means of the weight i, on the end of the curved lever, draws out said key, when the punch will remain inoperative, while the machine continues to run, until the operator has placed the sheet of metal to be operated upon in its proper position, when by slightly raising the ball or weight j, the key is again thrown in to form the working connection, and the punch then acts. This gives the operator sufficient time without regard to the motion of the machine to properly place his sheets or piece of metal to be operated upon.

M, is the punch stock guide, and N, an n 70 permanently fixed to the overhanging part c machine automatically at each operation of the punch, by means of the Weighted lever and key, or their equivalents, for the purpose of afording the operator time to place his sheets Without regard to t-he motions of the machine, when by a slight movement of the ball 0r lever uponrthe rising' of the punch the connection can be again formed, substan- 2O tially as described.

O. J. DAVIE. THOS. WM. STEPHENS.

Vitnesses to the signature of Ozias J.

' Davie z A. B. STOUGHTON, L. K. DONN. Witnesses to the signature of Thomas WV.

' Stephens:

AZRO GOFF, M.- I. GUDDELL. 

